IPC Main Group
H05B 39/00 Circuit arrangements or apparatus for operating incandescent light sources
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- Subclass:
- ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
4 direct subcodes
Child Classifications
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- H05B 39/02 Switching-on, e.g. with predetermined rate of increase of lighting current
- H05B 39/04 Controlling
- H05B 39/09 in which the lamp is fed by pulses
- H05B 39/1 Circuits providing for substitution of the light source in case of its failure